Fuel-oil burner



A. R. ANTHONY. FUEL OIL BURNER. APPLICATION FILED 050.30, I9l8.

2 SHEETSSHEET l.

Patented June 8, 1920.

%@X?&LLAQ M M A. R. ANTHON Y.

FUEL OILBURNER.

I APPLICATION FILED DEC. 30, 19H?- 1,342 ,7 32. Patented June 8, 1920.

2 SHEETS-SHEET 2- UNITED STATES ALFRED R. ANTHONY, OF DETROIT, MICHIGAN.

FUEL-OIL BURNER.

Specification of Letters I atent.

Patented June 8, 1920.

Application filed December 30, 1918. Serial No. 268,885.

To all whom it may concern:

Be it known that I, ALFRED R. ANTHoivY, a citizen of the United States,and residing at Detroit, Wayne county, State of Mlchlgan, have inventedcertain new and useful Improvements in Fuel-Oil Burners, of which thefollowing is a specification.-

The present invention relates to liquid fuel burners and moreparticularly to improvements in the mixing and atomizing devlcesthereof.

The objects and features ofnovelty of the invention will be apparentfrom the description taken in connection with the drawings, in whichFigure 1 is a longitudinal sectional View through a burner having mixingdevices constructed in accordance with the present 1nvention;

Fig. 2 is a sectional'elevation taken substantially on the line 2-2 ofFig. 1; and

Fig. 3 is a longitudinal sectional vlew of the oil tube of the burnerequipped with a modified form of cap.

Referring to the drawings, the numeral 10 indicates the hollow burnerbody having its opposite ends open and formed -with an air inlet 11. Afuel tube 12 is provided with an enlargement 13 at one end thereof andthis enlargement is threaded into the opening at one end of the body, asat 14, to close said opening. An air tube 15 1s dlsposed around the fueltube 12 being threaded on the enlargement 13 as at 15. The alr tube 15being spaced from the fuel tube 12 forms an air passage 16, the tube 15having apertures 17 through its wall so that air supplied through theopening 11 may pass into the passage 16. The tube 15 is spaced from thewalls of the burner body thereby providing a second air passage 18.Liquid fuel may be sup lied to the' interior passage 19 of the fuel tu ethrough the valve 20 connectedby means of a nipple 21 to the enlargedend of the fuel tube.

The discharge end of the fuel tube is closed by a conical wall 20 andthe end portion of the tube adjacent said wall has itsdiameter reducedand is formed with a plurality of apertures 21 whichare disposed in aplane transverse to the axis of the tube and are inclined to the radial.A cap 22 is threaded as at 23 on a reduced portion of .the fuel tube 12and has a conical end 24, spaced from the conical end of the fuel tube,thus form ing a fuel discharge chamber 25. In a like manner a cap 26 isthreaded on the end of the air tube 15 and has a conical end 27 spacedfrom the end 24 of the inner cap thereby forming an annular passage 28.The inner cap 22 has its end formed with a central aperture 29 and thecap 26 also has a central aperture '30 but of larger diameter than theaperture 29. It will be seen that because of the construction of the endof the fuel tube, the fuel issuing into the chamber 26 has a whirlingmotion,\and because of the conical surfaces surrounding the chamber 25the fuel will issue through the aperture 29 in the form of a conical jethaving a whirling motion. A conical stream of air discharged from thepassage 28 will intersect this conical fuel jet thereby atomizing the.fuel. A third cap 31 is screwed on the outside of the burner body andhas the conical end 32 spaced from the end 27 thereby forming theconical passage 33 from which a second conical stream of air isdischarged to intersect the jet issuing from the opening 30 of themiddle cap.

In order to effect further atomizing and mixing of the fuel and air, theair issuing from one of thea-ir passages may be given a whirling motion,preferably in a direction opposite to that of the fuel jet, For thispurpose the inner cap 22 has blades 34 which are curved in acircumferential. direction but are straight in the direction of the axisof the burner. Thus the air in flowing along the passage 16 isdischarged from the same into the passage 28 with a whirling motion in adirection transverse to the axis of the burner. C Because of thesimplicity of this burner, it may be manufactured at a low cost, and yetthe arrangement and construction is such that a very thorough mixture offuel and air and atomizing of the fuel are obtained.

In Fig. 3 of the drawings a form of the invention is illustrated inwhich the fuel tube 12 is provided with a cap 22 which has no means forgiving the air a whirling motion. Thus the cap is provided with theconical end 24 and is threaded on the tube as at 23'. The end of thefuel tube has the conical wall 20 and is formed with the reduced portionhaving apertures 21 disposed, as described heretofore. The end of thecap 22 is formed with the centrally arranged discharge opening 29 whichconstitutes the thoroughly v fuel tube closed at its discharge end andalso having a portion at said end reduced in diameter, a cap on said endhavlng a discharge opening co-axial with the tube,ifthe space betweenthe reduced end and cap forming a chamber, the tube wall at the reducedend having apertures inclined transversely to the radial whereby thefuel is discharged from the opening in the cap with a whirling motion.

2. A burner of the class described including in combination, a fuel tubehaving a conical closed discharge end and the exterior diameter at saidend being reduced,

. .a cap carried by the tube having a conical end spaced from theconical end of the tube and its side wall being spaced from the reducedend portion of the tube, the cap end having a central discharge opening,said reduced end portion formed with apertures through itswall inclinedto the radial whereby the fuel is given a whirling motion, and

7 means to direct a conical stream of air to intersect the j etissuingfrom the opening in said cap.

3. A burner of the class described including in combination, a fuel tubehaving a. conical closed discharge end and the exterior diameter at saidend being reduced, a cap carried by the tube having a conical end spacedfrom the conical end of the tube and its side wall being spaced from thereduced and means to effect a whirlin end portion of the tube, the capend having a central discharge opening, said reduced end portion formedwith apertures throu h its wall inclined to the radial whereby t e fuelis given a whirling motion, means to direct a conical stream of air tointersect the jet issuing from the opening in said cap,

motion of the stream of air in the opposite irection to that of the jet.

' 4. A burner of the class described including in combination, a fueltube having a conical closed discharge end ,and the exterior diameter atsaid end being reduced, a

cap carried by the tube having a conical end spaced from the conical endof the tube and its side wall being spaced from the reduced end portionof the tube, the cap end having a central discharge opening, saidreduced end portion formed with apertures through its wall inclined tothe radial whereby the fuel is given a whirling motion, means to directa conical stream of air-to intersect the jet issuing from the opening insaid cap,

and means on said cap to effect a whirling motion of the stream of airin the opposite direction to that of the jet.

5. A burner of the class described including in combination, a burnerbody having a fuel tube with a closed conical end, an air tubesurrounding the fuel tube, a cap on the end of the fuel tube having aconlcal end spaced from the end of the fuel" tube thereby forming achamber, the walls of the fuel tube at said end being reduced indiameter and formed with apertures inclined to the radial, a cap on theair tube having a conical end spaced from the fuel cap end, said capends each having a discharge openin coaxial with the fuel tube, andmeans to e fect a whirling motion of the air discharged from the airtube. I

In testimony whereof I aflix my signature.

ALFRED R. ANTHONY.

